Yamaha Outboard Owner Manuals | Yamaha Outboards A Yamaha outboard motor is a purchase of a lifetime and is the highest rated in reliability. Owner Manuals offer all the information to maintain your outboard motor. Close Form. 115 - 30 hp. 115 / 90 / 75 hp. Family & watersports power. 70 / 60 / 50 hp. Pontoon, fishing & recreation power. DOWNLOAD Yamaha 115hp (115 hp) Repair Manual It is created to be an encyclopedia for your Yamaha outboard. Yamaha 115hp Repair Manual. A Yamaha 115hp repair manual is the type of manual that many Yamaha outboard owners are the most familiar with. These are typically described as an after-market manual and can be more specific with the information in the manual than a Factory Service Manual.